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zhannawk [14.2K]
4 years ago
8

What may have helped horses change over the last 40 million years? A) an increase in their height and weight B) the coming and g

oing of several ice ages C) a change in their food, from trees to grass in the Great Plains D) being captured by Indians and used for work, pulling wagons and riding
Biology
2 answers:
Kitty [74]4 years ago
8 0

a change in their food, from trees to grass in the Great Plains

melisa1 [442]4 years ago
5 0

A change in their food, from trees to grass in the Great Plains.

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(Physical or Chemical Property). When you can use your 5 senses to determine a substance.
ser-zykov [4K]

The answer is Physical Property

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4 years ago
A pediatrician designs baby formula to help babies gain weight. To show his formula works, he compares the weights of babies tha
Lelechka [254]

Answer:

Dependent Variable: Babies that use the formula

Independent Variable: Babies Without the formula

Explanation:

As the formula dose Increases, So does the weight of the babies (figurativly)

This is the Dependent variable because it depends on another factor

The Independent variable doesn't depend on the amount of formula taken because it doesn't use the formula, therefore it doesn't depend on anything, its Independent.

7 0
3 years ago
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Which part of the heart takes blood from the veins and pumps it into a ventricle?.
Savatey [412]
Answer:
The right atrium takes blood from the veins and pumps it into a ventricle

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8 0
2 years ago
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what does the term 2pq represent in the hardy-weinberg equation? the frequency of homozygous recessive individuals the frequency
Nostrana [21]

The term 2pq represented in the hardy-weinberg equation is the frequency of heterozygotes and is denoted as option D.

<h3>What is Hardy-weinberg equation?</h3>

This mathematical equation is used to calculate the genetic variation of a population at equilibrium and can be seen below:

p² + 2pq + q² = 1

where

p² is dominant homozygous frequency (AA)

2pq is heterozygous frequency (Aa)

q² is recessive homozygous frequency (aa).

The 2pq can be seen as the heterozygous frequency which is therefore the reason why option D which is frequency of heterozygotes was chosen as the most appropriate choice.

Read more about Hardy-weinberg equation here brainly.com/question/5028378

#SPJ1

8 0
2 years ago
A fictional bacterial operon is responsible for the production of the biosynthetic enzymes needed to make the theoretical amino
Lostsunrise [7]

Answer:

a. The operon is under positive control

a.) Loss of enzyme synthesis results from loss of regulatory R gene product which is regulated in the presence of Tis ophane for transcription. Absence of (Tis), transcription is positively controlled by regulatory Rprotein

b.) The proposed model reveals Tis / B complex prevents Tis enzymes from undergoing transcription through the RB operator by binding to the B region

the role of the R protein is

-decrease affinity of Tis / B complex to B region of RB

-bind to the R region on RB

- change the conformation of B region

- yield decreased affinity of Tis / B complex when R gene is lacking preventing transcription in the process

Effects of the RB mutations is that R protein will not bind to Tis / B complex to reduce transcription

5 0
3 years ago
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